It is about the couple's dynamic. There is not a certain definition for this.

The one who is submissive...hmmm i think~

Having several alternative lifestyle male friends, I can tell you right now that it is ONLY based on who is comfortable with what. Partner A may bottom for B but top for C...its a dynamic that THEY haveto figure out. Feminine traits mean absolutely nothing.

Someone that doesn't mind being penetrated. Thats it. There shouldn't be a certain look to someone that bottoms lol

Definition?
Someone who finds pleasure of taking it up the >_>
Thats all there is to it

a man....? he doesn't need to be girly or feminine to bottom seriously bc that's a bit too much. A man is a man it doesn't matter if he's manly or not as long as he enjoys being at the receiving end it doesn't really matter.